Lös ut u (complex solution)
u=3^{\frac{2}{3}}e^{\frac{2\pi i}{3}}\approx -1,040041912+1,801405433i
u=3^{\frac{2}{3}}\approx 2,080083823
u=3^{\frac{2}{3}}e^{\frac{4\pi i}{3}}\approx -1,040041912-1,801405433i
Lös ut u
u=3^{\frac{2}{3}}\approx 2,080083823
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